package com.itheima.reggie.config;

import com.github.xiaoymin.knife4j.spring.annotations.EnableKnife4j;
import com.itheima.reggie.common.JacksonObjectMapper;
import com.itheima.reggie.interceptor.LoginInterceptor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

import java.util.List;

/**
 * @author Asin
 * SpringMvc 相关配置类
 */
@Slf4j
@Configuration
@EnableSwagger2
@EnableKnife4j
public class SpringMvcConfig implements WebMvcConfigurer {

    /**
     * 静态资源放行
     * @param registry
     */
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        log.info("开始静态资源映射");
        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");
        registry.addResourceHandler("doc.html").addResourceLocations("classpath:/META-INF/resources/");
        registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");
    }

    /**
     * 拦截未登录用户拦截访问站内资源
     * @param registry
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        log.info("开启未登录用户拦截");
        registry.addInterceptor(new LoginInterceptor()).
                excludePathPatterns( "/employee/login",
                                    "/backend/**",
                                    "/front/**",
                                    "/user/login",
                                    "/user/sendMsg",
                                    "/qrcode/**",
                                    "/pay/payNotify",
                                    "/doc.html",
                                    "/webjars/**",
                                    "/swagger-resources",
                                    "/v2/api-docs");
    }

    /**
     * 响应json数据转换
     * @param converters
     */
    @Override
    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        log.info("开启消息转换器");
        //1.创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
        //2.设置对象转换器
        messageConverter.setObjectMapper(new JacksonObjectMapper());
        //3.将此消息转换器加入到mvc的消息转换器集合中的第一位，优先使用此消息转换器，否则不会使用我们自定义的
        converters.add(0,messageConverter);
    }


    @Bean
    public Docket createRestApi() {
        // 文档类型
        return new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo())
                .select()
                .apis(RequestHandlerSelectors.basePackage("com.itheima.reggie.controller"))
                .paths(PathSelectors.any())
                .build();
    }

    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title("瑞吉外卖")
                .version("1.0")
                .description("瑞吉外卖接口文档")
                .build();
    }



}
